Skiving machine



@ct 9 n F. W CHRISTY sKIvINGr MACHINE Filed May 24. 1920 Patented Get, 9, 1923.

iieesee MACHINERY -coeoieemom oii-iemneson, newoiinsny,VA-.eonyoeeetom OFNEW smvliio `-iviecerum.

,fiippncetion` ined- Mayv 24,1520. sei-.iainui 333,777.2.. Y

a citizen ofthe United States, 4residing 4at Beverly, intheg-countyfof'Essex yand' State Y of Massa'chusetts,l have invented certain Improvements in -Skiving Machines?, of vwhich v. the followingdescriptionin connectionrgivith the accompanying drawings, is aspeciew .figures Y i Y I c `This .invention nelates to. the tleatment of -gt-ion, like reference chavaciel-'si onfthedraw- 4ings indicating like .parts .in 4the ,several leather -ror -s-ijniiflaii sheet .material -in manner to skive lthe edge thereof and at the sanne time to k'11e-nderthe@materialof uniform thielme'ss at and adj ecent, to the basent .the

el scafi In practising the/method of nishing `Jthe 'Y edge: ofzapiece of leather, set `forth in .the

patent to Halsey and. Peigl'ins ilo, '1,047 ,211,

in which the eX-treinefinaizgin Yon gone/side of the leather (usiuallythel iflesh;iside.)v is fsulojected tothe action of avvcshrink-ing agent suchv as .heat so, esito cause-the otherside 5to; curl toward thefshrunkeri side, ithas been found advantageotis,:when vthe :leath'errfvis thick icorfof a heid, relis actory nature, :to pi-'e-` pare the leathei` for the shrinking `r( )ggeration by producing aycoinparatilely iahriipt scarf :on its edgeajinachineadapted to produ-ce Vsuch a.1scarf being I shot-infin the :patent `-to .EnslimqN-o. 1,358,140.. Even after thele-,ath`

' theL abrupt scarf, stock -is removed lat and:

pensy in many casesftha'ta theusearifng 'opera-l` ftion.- ,I'Will f not producejthe vleest results` iun- .lessf-the leather fin vthe'locality at the yhase-.of the scarf is of unito-11m thicknessorsuhstanytiallyrxso throughol'it thev piece.

According to fthepresent invention, in ,addition tor thegremoval ot isteek t0; 1p reduce adjacent to fthe base of; thesfcagr ingsu'ch gimannerf that, ingtheffinished piece, the `maf aerial-in the loelityatithe hasev oaf-they scarf isy rendered of' substantial-ly uniform thickginallyf; and `\coniirenientlyithis desired runiitoifniity o'fth-ick- :ness-y "at-r-the particiiflarfilocality named ness; iffrit Ywas motf `the secured; hy producing a'gseait i of igiggle al inclination adjoining thefahigiipftfscar.

er is; ietuined tov-,its-norinal fpositionf-the ily Oil the, @militier` of thev material, j c c Refefflng fejbhdrwngsi Y Fig. l isav .perspectife :View 0i mpgffipnof machine foilo rO dncingthel desliij'ed Iesi'lt, -thedi'wing mechanism xbeing.omitted. n Fig. ,2 is a flongitndinal sectional View thifoiigh the feed roll-gandpresser vlfeet.

x Fig. jis anvenlaljged ont elevationshovv-l I, mg the position; of :the Work when v,heing skived. i

y .,Fig. 4t isfagdetail perspectiyeview '0f-the' .edge gage and `the ,ca xci'ier"V nieznherfor the .presser feet.l

stored lto 'a flaty position.A i

@FRANK W. YcHimsafi', orBEVERLY, iviiissecHUsnTme' Assignee v,Teeficfrnfinn suon .Y a 'pressen foot :having .a `vnotchito receive this Vv peripheral rih. The funotonfofthevr-ib VAis V*to force the edge of they,leent-heiout ,0f .the

plane o the body portion ,asfit Vreaches skiv-v .fingrpositioniso lthat Whenfthe skivedffleath' The iiiinienfal '2 indicatesthe '-diskiknie I 4andgt they '.'eed disk whichanay diiven in any suitable ,manner .as ,.disclosed, 4forexy jainplefin.patenttoayley No.f823,578fl VI'Jp- Y Y.on the fifameieo the mach-ine is A,a hearing f Whchfi'eplaces thensnal feed. Vlroll roiitlie inlachine. .feed rolliisjformed-, `prefereA ably, a frusta coziioallfeed surface 142 v `which.. is -neaily vparallel;with. `the `ciiftting vprojection .16 is formed .o'iithe .teediiollfnean Y 10o.V Y,

the inner edge, 'Secured to ,a 'y boss ,gonlt'he I longitudinal guideway a slot .2 2 by which it may be adjustably screw 24; being provided for This gage member is also provided With aV rib 80 ronan'.adjustal'ile carrier plate, 32

' which" carries Vapluralityof presserfeet.

. end against The carrier plate has a depending flange 34 at one end and athumb screw 36 rotatably engages this flange and is threaded into. the

gage member-2O to provide for'longitudinal `A guide.

adjustment ofthe carrier plate.' screw-v 39 is threaded 4into the gage member 'i and engages a`slot`38 in the carrier plate to i5 I serve asia 'guide for the latter.

' Secured to the carrier Vplate by ascreiv @ell d l .Irisa-spring tonguell() for a presser foot 42 vwhich hol\cls 'the material against the feed rollfand prevents'injury to .-thefbody por-V tion. This spring tongue has threaded therev in aV thumb screw tf'i'vhich abutsat its lo'iver the carrier plate' 32 and serves as ameans forv adjusting the presser foot 42 with 'reference Vto the feed roll to provide Vfor diierentV thicknesses "of stock.' in gugide pin'tS Which passes carrier ,l plate is a upwardly v4from the through. a slot Vin the spring tongue lOand latter in alinementiviththe adjacent parts'.

callyby'a guide pin 5 4: secured rier plate and projecting upwardly through tongue 40 by means o-f screws 52, is a spring 'tongue 50 carrying at its outer'end a presser `foot 56 Whichiengages'the material adjacent theedge and holds it against the feed roll. This spring tongue 50 is guidedvertito the carjajslotin 'the spring tongue. .The presser 'foot 56 is provided on its' innerv loweredge With Ya notch 58 toV receive the peripheral'.

Vrib or project-ion 16 on the feed roll and the vertical movement ofthe springV tongue may be limited by a thumb screw OvV'hich is threaded into the spring tongue and'carries a ycollar. 62 Vto engage the gage member 20.. The vertical fnoveinent ofthe spring tongue in a 'downward Vjusted by means of a thumb screw jed into the spring tongue and abutting its end against the carrier plate 821- lgThe provision of the tivo independently movable directionmay be ad- 64 thread.-

j presser feet 42 and 56 renders it possible for Vone of them to passover an uneven portion l f'fofi the-'leather Without' affecting the firmremote from the edge4 gage, andineansforV pressure'v ofthe other on the materiali" Y In' the operation of the machine, the Vmatei' VYrial is lplaced `with its edge against the guide i.arm26 and, as .it is fed into'the s'lriving -Y 'knife by theV feed roll, the circular .rib '16 forces theedge of the material out ofjtheY planefof the body portfioniand into the notch 58. in the presser foot" 56`.'- The Vmaterial 28 to receive a guide'- the machine to produce .bevels ofdifferent widths, the vertical adjustment ofthe serves to keep thel Secured' in a rectangular slot of th'e'spring I footf for engaging 1 a nari'ov.7 Yedgeof a blanlna guidejarm to co-operate f `.With the projection inforcing the edge of ytheblank outof the plane of its-body pei Y ofthemateria'l.V j 'l L a Y 1 "7l ln aV skivingmachine,i a knife,afeed: vdevice Yhaving a projection'thereom-a presser i :foot'ha'vi'ng 'a notch tof receive theprojeq presser feet provides forinaterial of different thicknesses and the longitudinal adjust @nent of the carrier. plate 32 .and presser foot', in effect,y varies the size of the notch cientfrooin.. if the stock is thick.

Having Ydescribed'my' 'nvention, lwhat l claim as new Yand desire to secure by ALetters latent of the-UnitedStates is 58 Vso that 'the turned up edge may have suffiil.' ln a Aslriving machine, ajlrnife, tivo? f members-v for engaging a blank of' sheetrna- Yteri'al onboth sides `and presenting* it to 4the f-lrnife,uone of the nieinbersfhaving aen'otch 'so located that the poitionof the blank;Av fed through vit ywill be severed by tlm/knife,-i and means including a projection 'on'the other member andv an edgegage for-guid-v In,D the notch. 1

' and forcingthe'- edgeof therbla-nk. into -2.`In ka slriving machine, a knife, a -pri.Y`

projecting portion to force the vedge cfa blank-out ofthe plane -of its body portion,

and a secondary presser foot independent ln a skiving machine, a vrlrnife,`a feed device VprovidedV with aprojection, a presser and a Vguide arnito coi-operate With the pro 4:. ln a'slnving machine, a knife',1afced device provided With aprojection, aprcsser section the jection in forcing the ,edge of th@ blank. Avinto the notch.

mary presserfoot,a feed device having' a i lof the first and having a notchvto cig-Qpme. VVWlflV the projection. 1-

lili

tion, and a secondary presser foot ferien-'5l `V`gaging a second Ysection of the blank next to said narrow section.

5. In askiving machine,a knife, afffee'd roll, a gage member, a plurality of presser feet, one adapted tofengageftlie'WorlradjaiV VVcent 'the edgegageonly and another adapted to engage'thevwork only ata locality-more 'adjusting fthe presser feet'findependent-ly toward andfromxtherlfe'ed roll. 1 6. In al skiving machine, a knife, V4affeed device, a presser member `to engage one por# v tion vof the materiahfand a presser finemberV insidethe other to bearfon another'portion tion, a gage member, and an arm on theA gage member to co-operate with the projection in forcing a blank into the notch.y i i 8. ln a skiving` machine, a knife, a gage member, a primary presser foot, a secondary presser foot, a feed device, and means to adjust the presser feet independently to,

Wards or from the feed device;

9. ik machine for operating upon a piece ofsheet material, having in combination, a knife, a feed roll shaped to present the material to the knife in such manner that a scarf will be-l produced at the eXtreme'edge of the material and the material reduced to a u niform thickness at the base of the scarf, and means for actuating the-knife and roll.

l0. A machine for operating upon a piece of sheet material, having in combination, a knife, a feed roll having ttvorvvork supporting surfaces, that on the outer end being adapted to present the .piece in such'manner that a locality spaced slightly from the edge ofthe piece will vbe reduced to a uniform thickness andthat on the inner end being raised to distort the material into a position in Which it Vwill be severed on a comparatively abrupt angle, means for actuating the `knife andrroll, Vand means for guiding the piece by engagementwith the edge thereof.V

1l. El machine for operating upon a piece of sheetmaterial, having in combination, cutting mechanism, and means for feeding the piece to the cutting mechanism in such manner that tivo scarves are formed on the margin thereof, a scarf of gradual inclination spaced from the edge of the piece, and

amore abrupt scarf extending from thel outer edge of the gradual s carf to the eX- treme edge of the piece.

12. A machine for operating upon a piece Y Vof sheet material, having in combination, a

rotary skiving knife, and means for feeding the piece to the knife in such positionthat an abrupt scarf is produced on the extreme edge of the piece and a scarf of gradual inclination adjoining the abrupt scarf.

13. A machine for operating upon a piece of sheet material, having in combination, a

knife, means for feeding the margin of the piece to ythe knife in position toA cause the knife to produce upon the margin a bevel tionto be produced simultaneously along the sol piece to Vthe knife iii-:positionto cause the knife to produce upon the margin` a bevelv yof gradual inclination, and means for bending the edgeofthe vpiece toward the `knife to cause 'a second bevel ofav greater inclination to be produced along` theextreme edge. v l5. A machine for operating upon a piece `of sheet material, having in combination, a

knife, a vroll Afor advancing the material to theV knife, said rollfhaving two surfaces, one raised above the other withirespect to the position of .the Hknife, independently yieldable presser feet,.one located tocooperate With each surf ace,andv means for actuating thev roll andknife. y

16. A machine for operating upon a piece of sheet material, having in combination, a

the knife, said rolll having .two surfaces, one raised above the other with respect to the `knife, a vroll for advancingthe material to`A position of the knife, a yieldablepresser foot having an unbroken surface arranged to cof operatewith the lovver surface of the roll,

`ayieldable presser foot having a depressionin its surface arranged to co-operate with the raised surface of the roll, and means for actuatingthe knife and roll.

17;-Tlie method .of treating a piece ofY sheet material Which consists in forming'a comparatively abrupt scarfon said edge and `in renderingthe leather of'uniform thickness in the locality at the base of the scarf.. 18. The method of treating a piece of sheet material Which consists in forming on the margin of the piece a scarf of gradualinclination spaced from the edge of the piece and an abrupt scarfextendingfromv the outer edge of the gradual extreme edge of the piece.V i In testimony whereof Il have signed my name to this specification.

' FRANK W. CHRISTY.

scarf to the 

